Local fixed die ejection mechanism of die-casting die

Abstract

The utility model discloses a local fixed die ejection mechanism of a die-casting die, which comprises a fixed die and a movable die, a product forming cavity is arranged between the fixed die and the movable die, an elastic block is arranged at the edge of the product forming cavity, the elastic block is provided with a product forming part, the product forming part comprises a side edge forming part and a top end forming part, the product forming part is matched with the product forming cavity to form a product, the side edge forming part is used for forming side edges of the product, and the top end forming part is used for forming the top end of the product; the elastic block is connected to the head end of the push rod, the push rod is arranged in a push rod hole of the fixed die and slides in a reciprocating mode along the push rod hole, and a spring is arranged between the elastic block and the fixed die and supported between the elastic block and the fixed die. According to the utility model, the original ejector pin and ejector pin plate are replaced by the elastic block structure, so that local ejection of a product can be realized, the mold strength can be ensured, and burrs of the product are reduced.

Description

Technical Field

[0001] This utility model relates to the field of die casting mold technology, specifically to a partial fixed mold ejection mechanism for a die casting mold. Background Technology

[0002] When a die-casting mold opens, the product must remain in the moving mold, and then the ejector pins will push the product out for easy removal. If the clamping force in the fixed mold is too large, the product may experience localized deformation, or even partial breakage, with the broken part sticking to the fixed mold and failing. To facilitate the product's removal from the fixed mold, an ejector pin mechanism is usually added to the fixed mold to push the product out and ensure that the product remains in the moving mold.

[0003] As disclosed in patent application CN 220717743 U, the fixed mold ejection mechanism of a die-casting mold uses ejector pins and a reset rod fixed on the ejector plate, and the ejector pins are pressed and fixed by an ejector pin fixing plate. An ejection spring is provided behind the ejector pin fixing plate and is fixed by a limit post. When the moving mold closes, the moving mold presses the reset rod, which drives the ejector plate, ejector pin fixing plate, and ejector pins to reset under the action of the moving mold closing force. During the mold closing process, the ejection spring is gradually pressed. When the mold opens, the moving mold separates from the fixed mold, the pressed ejection spring releases pressure, and pushes the ejector plate and ejector pins forward, realizing the action of ejecting the casting from the fixed mold, thus keeping the product on the moving mold. Although this ejection mechanism realizes the ejection of the product from the fixed mold, the ejection mechanism occupies a large space, which increases the cost of the die-casting mold. Moreover, the hollowing out of the ejector plate mounting area on the fixed mold affects the mold strength and makes the product prone to burrs. Utility Model Content

[0004] The purpose of this invention is to provide a partial ejection mechanism for a die-casting mold. This ejection mechanism can achieve partial ejection of the product when single-point ejection is required, and eliminates the need for ejector plates and ejector pins, thus ensuring mold strength and reducing burrs on the product.

[0005] To achieve the above-mentioned technical objectives, the technical solution of this utility model is as follows:

[0006] A partial fixed mold ejection mechanism for a die-casting mold includes a fixed mold and a moving mold. A product forming cavity is provided between the fixed mold and the moving mold. A spring block is provided on the edge of the product forming cavity. The spring block is provided with a product forming part. The product forming part includes a side forming part and a top forming part. The product forming part cooperates with the product forming cavity to form a product. The side forming part is used for forming the side of the product, and the top forming part is used for forming the top of the product.

[0007] The spring block is connected to the head end of the push rod, which is set in the push rod hole of the fixed mold. The push rod slides back and forth along the push rod hole. A spring is provided between the spring block and the fixed mold, and the spring supports the spring block and the fixed mold.

[0008] When the fixed mold and the moving mold are closed, the moving mold presses the spring block, which drives the push rod to slide along the push rod hole, and the spring is gradually pressed. When the product is formed, the product forming part cooperates with the product forming cavity to form the product. The side forming part participates in the side forming of the product, and the top forming part participates in the top forming of the product. After the product is formed, the top forming part is located at the top of the product. When the mold is opened, the moving mold and the fixed mold separate, the pressed spring releases pressure, pushes the spring block forward, and the top forming part of the spring block pushes the product, realizing the action of the fixed mold ejecting the product.

[0009] Preferably, the fixed mold is provided with a spring block guide hole, and the spring block moves back along the spring block guide hole.

[0010] Preferably, the fixed mold is provided with a spring receiving hole.

[0011] Preferably, the spring is mounted on the push rod.

[0012] To limit the push rod and prevent it from dislodging from the push rod hole, a limit block is provided at the tail end of the push rod.

[0013] Preferably, the fixed mold is provided with a limiting block receiving hole, and the limiting block is disposed in the limiting block receiving hole.

[0014] This invention replaces the original ejector pin and ejector plate design with a spring block structure, which not only enables partial ejection of the product, but also ensures the strength of the mold and reduces product burrs. Attached Figure Description

[0015] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0016] Figure 1 This is a structural schematic diagram of the cross-section of this utility model.

[0017] Figure 2 This is a partial structural diagram of the present utility model. Detailed Implementation

[0018] like Figure 1-2As shown, a partial fixed mold ejection mechanism for a die-casting mold includes a fixed mold 1 and a moving mold 2. The fixed mold 1 and the moving mold 2 form a product forming cavity 3. A spring block 4 is provided on the edge of the product forming cavity 3. The spring block 4 is connected to the head end of a push rod 5, and a limiting block 7 is provided at the tail end of the push rod 5. The fixed mold 1 is sequentially provided with a spring block guide hole 14, a spring receiving hole 16, a push rod hole 15, and a limiting block receiving hole 17. The spring receiving hole 16 is located between the spring block guide hole 14 and the push rod hole 15, and the push rod hole 15 is located within the spring receiving hole 16 and the limiting block receiving hole 17. Push rod 5 is located inside push rod hole 15 and moves back along push rod hole 15. Spring block 4 is located inside spring block guide hole 14 and moves back along spring block guide hole 14. Limiting block 7 is located inside limiting block receiving hole 17. Spring 6 is mounted on push rod 5 inside spring receiving hole 16, and spring 6 is supported between spring block 4 and push rod hole 15. When spring block 4 moves back along spring block guide hole 14, push rod 5 moves back along push rod hole 15, and limiting block 7 reciprocates within limiting block receiving hole 17.

[0019] On the side of the product forming cavity 3, the spring block 4 is provided with a product forming part, which includes a side forming part 41 and a top forming part 42. The product forming part cooperates with the product forming cavity 3 to form the product 31. The side forming part 41 is used for forming the side of the product, and the top forming part 42 is used for forming the top of the product.

[0020] When the fixed mold 1 and the moving mold 2 are closed, the moving mold 2 presses the spring block 4, and the spring block 4 drives the push rod 5 to slide along the push rod hole 15, and the spring 6 is gradually pressed. When the product 31 is formed, the product forming part cooperates with the product forming cavity to form the product. The side forming part participates in the forming of the side of the product, and the top forming part participates in the forming of the top of the product. After the product is formed, the top forming part 42 is located at the top of the product 31. When the mold is opened, the moving mold 2 and the fixed mold 1 are separated, the pressed spring 6 releases pressure, pushes the spring block 4 to move forward, and the top forming part 42 of the spring block 4 pushes the product, realizing the action of the fixed mold ejecting the product.

[0021] This embodiment replaces the original ejector pin and ejector plate design with a spring block structure, which not only enables partial ejection of the product, but also ensures the strength of the mold and reduces product burrs.

[0022] The above embodiments do not limit the present invention in any way. All technical solutions obtained by equivalent substitution or equivalent transformation fall within the protection scope of the present invention.

Claims

1. A partial mold-die ejector mechanism for a die-casting mold, characterized by: The application relates to a moulding machine comprising a fixed mould and a movable mould, a product moulding cavity is arranged between the fixed mould and the movable mould, the edge of the product moulding cavity is provided with an elastic block, the elastic block is provided with a product moulding part, the product moulding part comprises a side edge moulding part and a top end moulding part, the product moulding part is used for moulding a product in cooperation with the product moulding cavity, the side edge moulding part is used for moulding the side edge of the product, and the top end moulding part is used for moulding the top end of the product; the elastic block is connected to the head end of a push rod, the push rod is arranged in a push rod hole of the fixed mould, the push rod reciprocatingly slides along the push rod hole, a spring is arranged between the elastic block and the fixed mould, and the spring is supported between the elastic block and the fixed mould.

2. A partial mold half ejection mechanism for a die casting mold as defined in claim 1, wherein: The fixed mould is provided with an elastic block guide hole, and the elastic block reciprocatingly displaces along the elastic block guide hole.

3. A partial ejector mechanism for a die casting mould according to claim 1 or 2, characterised in that: The fixed mould is provided with a spring accommodating hole.

4. A partial mold half ejection mechanism for a die casting mold as defined in claim 1 wherein: The spring is sleeved on the push rod.

5. A partial mold half ejection mechanism for a die casting mold as defined in claim 1 wherein: The tail end of the push rod is provided with a limiting block.

6. A partial mold half ejection mechanism for a die casting mold as defined in claim 5 wherein: The fixed mould is provided with a limiting block accommodating hole, and the limiting block is arranged in the limiting block accommodating hole.

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